JurgensenAlm said:

He COULD have gone through our immigration system.

You're under the mistaken impression that America has one.

Obviously we do have a workable immigration system because immigrants DO use it and become citizens.

That using our system may B tedious it does work.

700.000 immigrants become US citizens per year.  I just checked it out.

The US system has so many loopholes. As an employer, I was not allowed to hire anybody except American citizens or people with a residence visa (green card) but we did use some subcontractors who had their own employees. We were audited but the subcontractors were not because they were a "small business".